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Finding Daily or Monthly Data

First, find the closest station with available data (see station locations). For daily maximum and minimum temperature or precipitation, there may be a cooperative observer site closer than a Mesonet site. For snowfall, you will need cooperative observer data. For other variables (such as humidity, wind, soil temperatures), most likely you will need either Mesonet data or a First-Order NWS station


Cooperative Observer Data:

  • A Month in Time - a graphical calendar display of daily maximum, minimum temperature and precipitation for a selected station and year/month.
  • Timeseries Information -  a tabular listing of selected variables (daily maximum temperature, minimum temperature, temperature at observation time, precipitation, snowfall, and/or snow depth), based on the selected station's period-of-record. The data can be easily copied from the screen and pasted into a spreadsheet or text editor.
  • Climatological Data - the official archive of daily cooperative observer observations in a monthly PDF document. The data are available from NCDC for a fee, but OCS maintains an archive for our own use and/or printing or e-mailing to others (just do not provide the web URL). Prnted copies are also kept in the OCS library.
  • Readcoop (program) on cig /ocsdata/coop/apps/ can be used to extract eithe daily or monthly-summarized observations to a specified file. This is useful for requests of month-by-month precipitation totals at a station, for example.


First-Order Stations:

  • Local Climatological Data - monthly PDF files containing a summary of daily weather at Oklahoma City or Tulsa and 3-hourly readings for each day of the month. The files are available from NCDC for a fee, but OCS maintains an archive for our own use and/or printing or e-mailing to others (just do not provide the web URL). Variables include temperature, dew point, degree days, weather types, snowfall, precipitation, pressure, and wind speed and direction. Printed copies are also kept in the OCS library.
  • F-6 forms - summaries of observations from First-Order stations, maintained on each NWS Forecast Office website for stations within their area of responsibility. Data are similar to the front-page of Local Climatological Data, but also include sunshine and sky cover.
    • Norman - Oklahoma City, Wichita Falls, Bethany, Clinton, Frederick, Gage, Guthrie, Hobart, Lawton, Ponca City, Stillwater
    • Tulsa - Tulsa, Bartlesville, Fayetteville, Fort Smith, Highfill (AR - Northwest), McAlester, Muskogee, Riverside (Jenks)
    • Amarillo - Amarillo, Borger, Dalhart, Guymon
    • Shreveport: De Queen (AR), El Dorado (AR), Longview (TX), Lufkin (TX), Monroe (LA), Shreveport (LA), Texarkana (AR), Tyler (TX)


Mesonet Summarized Daily / Monthly Data

  • Mesonet Climatological Data (click on Monthly Summaries) - similar to the front page of Local Climatological Data, these summaries present Mesonet data from a calendar day (CST) for 1994 through the current month (previous day). Variables include temperature, dewpoint, degree days, humidity, rainfall, pressure, wind speed and direction, solar radiation, and soil temperature. Summarized data for the month is included in the lower portion of the document. Available as HTML for quick-look / reference or PDF for printing. These are very useful for requests that cover one or two months; for longer periods use the Mesonet Daily Data option (see below).
  • Mesonet Daily Data (click on Daily Data Retrieval) - returns selected stations, dates, and variables in a comma-delimited format, either to the browser or (for large requests) via a zip file sent by e-mail. Maxima, minima, and averages of any variable are available. For winds, primary and secondary direction can be selected with associated frequencies (percent of observations the wind was blowing from that direction). The comma-delimited format can be imported into spreadsheets. CAUTION: each new days includes a header, so when you import the file to a spreadsheet, you will need to sort the data and delete the extra header lines.
  • Mesonet Monthly Data - Based on the daily files, the Mesonet Monthly Data provides summarized maxium, minimum and average for each of the daily variables. Data are returned in a comma-delimited format to the browser, regardless of the quantity of data requested. Make sure the browser has completely loaded all requested data before copying the data from the browser to a spreadsheet.
  • Mesonet Query / Daily data search engine - Searches for occurrences of specified criteria among selected stations, variables, and dates. Matches are returned to the browser. The Query is useful for questions such as "have we broken 100 degrees at Alva this summer" or "what stations were below freezing last night".
  • Mesonet Climate Division Summary - Provides an overview of conditions by each climate division for any period specified (even though the title says "Seven Day Mesonet Totals"). Information includes the highest and lowest air temperature (with location and date of occurrence), soil temperatures, and rainfall for each climate division. An additional table provides the climate-division average maximum, minimum and overall average temperatures for each climate division.
  • Recent Mesonet Rainfall - Rainfall totals for each Mesonet site for 7, 10, 14, 30, 60 and 90-day periods. CAUTION: if a station is missing more than a threshold number of observations, it is not listed in the table.
  • Rainfall and Drought Update - maps and climate division tables of precipitation totals, departures, and rankings for periods ranging from 30 days to one year. Past seasons and years are also available.